Random access to a sequence file

[arajkovic]

Hi,
Is it possible to retrieve a random sequence from a sequence file which has been previously indexed?
I'm looking at the SequenceFile class and it seems that is only possible to fetch them into a SequenceBlock sequentially. Am I correct?
Basically I'm looking for any feature of pyhmmer that allows me to fetch sequences like esl-sfetch.
Thanks!

[arajkovic]

With a fresh brain I've been able to figure it out. One can utilise the SSIReader class like this

from pyhmmer.easel import SSIReader

with SSIReader(
    "/path/to/hmmpgmd.ssi"
) as ssi, open(
    "/path/to/hmmpgmd", mode="rt"
) as fh:
    sequence_key = "1"
    entry = ssi.find_name(sequence_key.encode())
    fh.seek(entry.data_offset)
    sequence = fh.read(entry.record_length)

A nice thing to have (although no errors are thrown) is to have functions find_name and file_info exposed in easel.pyi.